| Liquid upright median (IQR) | Liquid supine median (IQR) | Solid upright median (IQR) | Solid supine median (IQR) | |
| LOS residual P (mm Hg) | 5.6 (4.6–7.5) | 2.8 (0.8–5.0) | 7.3 (5.1–11.5) | 4.8 (1.7–8.9) |
| Mean wave amplitude (mm Hg) | 51.6 (44.6–68.5) | 75.8 (52.1–91.9) | 62.5 (57.7–128.3) | 93.5 (76.5–113.4) |
| IBP 1 cm above LOS (mm Hg) | 11.3 (7.9–16.1) | 9.3 (6.1–12.0) | 15.5 (11.3–22.8) | 12.9 (9.5–15.8) |
| Time to positive OGPG (s) | 4.3 (3.9–5.1) | 3.7 (3.6–4.3) | 4.8 (4.2–5.5) | 4.5 (3.8–6.3) |
| OGPG (mm Hg) | 11.1 (10.6–17.9) | 10.4 (8.5–13.4) | 16.7 (12.9–22.3) | 11.7 (10.3–17.0) |
IBP, intrabolus pressure; IQR, interquartile range; LOS, lower oesophageal sphincter; OGPG, oesophagogastric pressure gradient.